Currently we provide separate MSI help packages - one for each locale. This often creates confusion to people who fail to make sure that help package they installed strictly matches their LO UI language.
Total size of all help packages e.g. in http://downloadarchive.documentfoundation.org/libreoffice/old/18.104.22.168/win/x86_64/ is about 150 MB. Given that main LO installer there is 282 MB, it seems reasonable to expect those who need help packages to afford downloading extra 150 MB (in reality, there would be less, because of deduplication of installation machinery overhead). That would put all documentation for all languages available for LO, and so it would be able to pick needed help without disturbing users.
As an enhancement, it makes sense. Moving to NEW
I don't understand the reasoning here. LO is only 282MB, so 150MB for the whole/all languages helpcontent corresponds to 50% of LO size, it's not nothing.
I think if you download Spanish localization of LO for example, it should just propose by default Spanish help. If you want Italian help, you should just use the LO setup to check the Italian helpcontent checkbox so it would indicate to LO to download the package and install it. (I don't know if this mechanism exist but it would be useful).
I'd like to avoid LO becoming a bloatware, I mean we could also just propose one package per env (Windows, Linux, MacOs, Android, etc.)/ version instead of one package per env/version/language and would have even bigger packages.